With an estimated 500 trillion feet of natural gas, the Marcellus Shale, running under much of Pennsylvania and New York state, represents a huge opportunity for energy companies. While Range Resources and Cabot Oil & Gas were among the first companies to start operations in the region, natural gas giants like Chesapeake Energy quickly moved in as well, creating jobs as well as questions about the true environmental impact. In Under the Surface: Fracking, Fortunes, and the Fate of the Marcellus Shale, author Tom Wilber investigates everything from the initial land rush to the innovations in drilling technology. In this audio segment, he discusses the varying degrees of disclosure among the energy companies and analyzes where he believes the future of the natural gas revolution is going.

In addition to being profiled in Tom Wilber's new book, ExxonMobil is also one of the companies in The Motley Fool's report featuring some of the biggest and best-known brand names in global business. It's called "Secure Your Future With 9 Rock-Solid Dividend Stocks," and you can get access it to it right now at no cost. Simply click here -- it's free.